Represents a range of characters represented by a lexical token within a Source.
The 1-indexed column number at which this Token begins.
The character offset at which this Node ends.
The kind of Token.
The 1-indexed line number on which this Token appears.
Tokens exist as nodes in a double-linked-list amongst all tokens including ignored tokens.
The character offset at which this Node begins.
For non-punctuation tokens, represents the interpreted value of the token.
Note: is undefined for punctuation tokens, but typed as string for convenience in the parser.